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<p>The QSpacerItem class provides blank space in a layout. <a href="#details">More...</a></p>
<pre> #include &lt;QSpacerItem&gt;</pre><p>Inherits <a href="qlayoutitem.html">QLayoutItem</a>.</p>
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<li><a href="qspaceritem-members.html">List of all members, including inherited members</a></li>
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<h3>Public Functions</h3>
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<li><div class="fn"/><b><a href="qspaceritem.html#QSpacerItem">QSpacerItem</a></b> ( int <i>w</i>, int <i>h</i>, QSizePolicy::Policy <i>hPolicy</i> = QSizePolicy::Minimum, QSizePolicy::Policy <i>vPolicy</i> = QSizePolicy::Minimum )</li>
<li><div class="fn"/>void <b><a href="qspaceritem.html#changeSize">changeSize</a></b> ( int <i>w</i>, int <i>h</i>, QSizePolicy::Policy <i>hPolicy</i> = QSizePolicy::Minimum, QSizePolicy::Policy <i>vPolicy</i> = QSizePolicy::Minimum )</li>
<li><div class="fn"/>virtual bool <b><a href="qspaceritem.html#isEmpty">isEmpty</a></b> () const</li>
<li><div class="fn"/>virtual QSpacerItem * <b><a href="qspaceritem.html#spacerItem">spacerItem</a></b> ()</li>
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<li><div class="fn"/>17 public functions inherited from <a href="qlayoutitem.html#public-functions">QLayoutItem</a></li>
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<h2>Detailed Description</h2>
<p>The QSpacerItem class provides blank space in a layout.</p>
<p>Normally, you don't need to use this class directly. Qt's built-in layout managers provide the following functions for manipulating empty space in layouts:</p>
<p><table align="center" cellpadding="2" cellspacing="1" border="0">
<thead><tr valign="top" class="qt-style"><th>Class</th><th>Functions</th></tr></thead>
<tr valign="top" class="odd"><td><a href="qhboxlayout.html">QHBoxLayout</a></td><td><a href="qboxlayout.html#addSpacing">addSpacing()</a>, <a href="qboxlayout.html#addStretch">addStretch()</a>, <a href="qboxlayout.html#insertSpacing">insertSpacing()</a>, <a href="qboxlayout.html#insertStretch">insertStretch()</a></td></tr>
<tr valign="top" class="even"><td><a href="qgridlayout.html">QGridLayout</a></td><td><a href="qgridlayout.html#setRowMinimumHeight">setRowMinimumHeight()</a>, <a href="qgridlayout.html#setRowStretch">setRowStretch()</a>, <a href="qgridlayout.html#setColumnMinimumWidth">setColumnMinimumWidth()</a>, <a href="qgridlayout.html#setColumnStretch">setColumnStretch()</a></td></tr>
</table></p>
<p>See also <a href="qlayout.html">QLayout</a>, <a href="qwidgetitem.html">QWidgetItem</a>, and <a href="qlayoutitem.html#spacerItem">QLayoutItem::spacerItem</a>().</p>
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<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QSpacerItem"></a>QSpacerItem::QSpacerItem ( int <i>w</i>, int <i>h</i>, <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>hPolicy</i> = QSizePolicy::Minimum, <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>vPolicy</i> = QSizePolicy::Minimum )</h3>
<p>Constructs a spacer item with preferred width <i>w</i>, preferred height <i>h</i>, horizontal size policy <i>hPolicy</i> and vertical size policy <i>vPolicy</i>.</p>
<p>The default values provide a gap that is able to stretch if nothing else wants the space.</p>
<h3 class="fn"><a name="changeSize"></a>void QSpacerItem::changeSize ( int <i>w</i>, int <i>h</i>, <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>hPolicy</i> = QSizePolicy::Minimum, <a href="qsizepolicy.html#Policy-enum">QSizePolicy::Policy</a> <i>vPolicy</i> = QSizePolicy::Minimum )</h3>
<p>Changes this spacer item to have preferred width <i>w</i>, preferred height <i>h</i>, horizontal size policy <i>hPolicy</i> and vertical size policy <i>vPolicy</i>.</p>
<p>The default values provide a gap that is able to stretch if nothing else wants the space.</p>
<p>Note that if changeSize() is called after the spacer item has been added to a layout, it is necessary to invalidate the layout in order for the spacer item's new size to take effect.</p>
<p>See also <a href="qlayoutitem.html#invalidate">QSpacerItem::invalidate</a>().</p>
<h3 class="fn"><a name="isEmpty"></a>bool QSpacerItem::isEmpty () const&nbsp;&nbsp;<tt> [virtual]</tt></h3>
<p>Returns true.</p>
<p>Reimplemented from <a href="qlayoutitem.html#isEmpty">QLayoutItem</a>.</p>
<h3 class="fn"><a name="spacerItem"></a>QSpacerItem * QSpacerItem::spacerItem ()&nbsp;&nbsp;<tt> [virtual]</tt></h3>
<p>Returns a pointer to this object.</p>
<p>Reimplemented from <a href="qlayoutitem.html#spacerItem">QLayoutItem</a>.</p>
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